Mark II Navigation Computer
The Mark II computer introduced on the E38 and E39 as of 9/97 production. There are considerable changes to the system. The connectors for the ARCNET and magnetic field sensor have been deleted as well as the 3 amp external fuse. The external blade type connections have been replaced by two 26-pin ELO type connectors.
Internally, a Gyro Sensor has been added to measure the motion of the vehicle on its vertical axis. The gyro sensor is integral to the navigation computer and cannot be serviced separately.
The internal gyro sensor eliminates the need for the magnetic field sensor from Mark I.
The front faceplate of the Mark II computer appears identical to the Mark I system, however they are not interchangeable.